From d969788b935456d7fb704716522900dce564c810 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Wed, 22 Aug 2018 11:24:07 +0100
Subject: [PATCH] syscall_exec16: Rework close_on_exec a bit to fix SDCC crap
 code generation

---
 Kernel/syscall_exec16.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Kernel/syscall_exec16.c b/Kernel/syscall_exec16.c
index 58fc0e00..876258ec 100644
--- a/Kernel/syscall_exec16.c
+++ b/Kernel/syscall_exec16.c
@@ -5,10 +5,14 @@
 
 static void close_on_exec(void)
 {
-	int j;
+	/* Keep the mask separate to stop SDCC generating crap code */
+	uint16_t m = 1 << (UFTSIZE - 1);
+	int8_t j;
+
 	for (j = UFTSIZE - 1; j >= 0; --j) {
-		if (udata.u_cloexec & (1 << j))
+		if (udata.u_cloexec & m)
 			doclose(j);
+		m >>= 1;
 	}
 	udata.u_cloexec = 0;
 }
-- 
2.34.1